Cancel other promises when one of any composition got fulfilled

When you do
[OMPromise any:@[A, B, C]];
and e.g. B is fulfilled.
Wouldn't it be cool to cancel A and C.
It's not a big deal, but users may expect such behavior, special when there is a cancel method on promises.
Same is true for progress. If we have an any concatenation, we are done (100% progress) when any of the promises is fulfilled.